OCFS2/Reflink-Illustrated

REFLINK ILLUSTRATED

This page illustrates the use of reflink to both explain the feature and to show the usage of some utilities that are required to create and monitor reflinks. These utilities are available for download.

Let us start by noting the available space in the volume. It shows 47GB free.

The shared-du utility shows us a total usage of 25000 MB but a footprint of 5000 MB. That is expected as all files share the same set of extents on disk. (The number in parenthesis is the total shared extents for that file.)